Ferro-ferri-nybøite
A variety of Nybøite Root Name Group
What is Ferro-ferri-nybøite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferro-ferri-nybøite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Ferro-ferri-nybøite Localities Map
See where Ferro-ferri-nybøite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black
- Hardness (Mohs)
- 6
- Density
- 3.424 g/cm³
- Streak
- Greyish-green to black
Chemical Properties
- Chemical Formula
- NaNa2(Fe2+3,Mg)Fe3+2(OH)2 The nybøite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and C(Al+Fe3++2Ti) > 1.5 apfu Ferro-ferri-nybøite is defined with A position: Na dominant C2+ position: Fe dominant C3+ position: Fe dominant W position: (OH) dominant
- Elements
- Al, Fe, H, Mg, Na, O, Si
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Ferro-ferri-nybøite FAQs
How do I identify Ferro-ferri-nybøite?
Ferro-ferri-nybøite can be identified by its hardness of 6 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Ferro-ferri-nybøite?
Ferro-ferri-nybøite typically appears in Black. Color can vary depending on impurities and formation conditions.
How hard is Ferro-ferri-nybøite?
Ferro-ferri-nybøite has a hardness of 6 on the Mohs scale. This gives it moderate hardness.